ludwig



(No Model.) 2 sheetssheet 1.

0. LUDWIG.

SMBLTING PURNAGB.

No. 505,112.. Patented Sept. 19, 1893.

(No Model.) n n 2 Sheetst-Sheet 2;

SMELTNG FURNAG'E.

110.505,112. Patented Sept. 19, 1893i.VV

NITED STAT-Es PATENT OFFICE.

OSCAR LUDWIG, OF CHICAGO, ILLINOIS, ASSIGNOR OF THREE-FOURTHS TO JAMES L. BOARD, ROBERT D. WARDWELL, AND ELLSWORTH M. BOARD, TRUSTEE, OF SAME PLACE.

SMELTING-FURNACE.

SPECIFICATION forming part `of Letters Patent No. 505,112, dated September 19, 1893. Application led August 4, 1892. Serial No. 442,100. (No model.)

To all whom t may concern: jet t' is arranged overand communicates with Be it known that I, OSCAR LUDWIG, a citithe pipe e while an oil pipe j (Fig. 1) also in zen of theUnited States, residingat Chicago, communication with said jet t' is arranged to county of Cook,State of Illinois, have inventconnect with an oiltank K. A valve j serves 5 ed a certain new and useful Improvement in to regulate theiow of oil to the jet. Branch- 5 5 Smelting-Furnaces; and I declare the following from the steam pipe 71. is a secondary pipe ing to be a full, clear, and exact description 7c which is Aextended downwardly and conof lthe invention, such as will enable others nected with a bent pipe or bustle? L which skilled in the art to which it pertains to make is provided with a series of jets L which are 1o and use the same, reference being had to the projected respectively into openings m lead- 6o accompanying drawings, which form a part ing into the furnace immediately above the of this specification. well d as shown in Figs. l and 4. While I The object of my invention is to provide a have herein shown these jets L', yet I would smelting furnace more particularly adapted have it understood that I might dispense with r 5 for the smelting of lead are which shall be so them if desired as they simply aid the com- 65 constructed that the ore while entering said bustion and are not essential to the operfurnace and before it is reduced, may be thorativeness of the furnace. So also the-steam oughly dried and roasted and the deleterious, might be supplied at this point through origases driven therefrom. iices in the pipeL instead-of through the nipzo A further object is to so construct said furples L. 70 nace that it may be rendered portable and Communicating with an opening in the driven at a moderate cost. Moreover I desire side of the furnace and below the mouth of to adapt the same to the use of hydrocarbon the pipe cis a hollow chute n preferably made or other oil as a fuel. of boiler iron `and inclined upwardlyv at such z 5 To these ends my invention consists in the an angle that will readily cause the ore placed 75 combination of elementshereinafterdescribed therein to be readily fed to the furnace. and claimed. Said chute is lined with fire-brick n', is pro- In the drawings: Figure 1 represents a side vided with a hopper o for the supply of ore elevation partly in section of a smelting furthereto, and with an upward extension or 3o nace embodying my invention. Fig. 2 is al chimney p. The hopper is closed by means 8o horizontal section on the line 2-2 of Fig. 1. of a lid o which prevents the escape of fumes Fig. 3 is a similar section on the line 3-3 of therefrom. A series of doors n2 only one of Y Fig. 1. Fig. 4 is a similar section on the line which is shown is arranged in the side of the 4--4 of Fig. 1. chute, `to enable it to be cleared from. stop- 3 5 In carrying out my invention a represents l page. The usual inclined passage q commu- 8 5 the body of my improved furnace, which connicating with the bottom of the well enables sists preferably of a cylindrical wrought iron the metal to be withdrawn therefrom. The shell lined with fire brick b. The top is covusual ore-dump r serves as a support for the ered by a removable :metal dome c while in inclined chute.

4o the bottom is formed a well d. The dome c The operation is as follows: The heating 9o is provided with a central opening through chamber and the parts therein are rst thorwhich is inserted a cast iron pipe c which is oughly heated in any desired way preferably open at both ends. Surrounding the pipe c by allowing oil to run into the well and on in the upper part of the furnace is a steam being ignited the iiames will soon heat the 45 pipe f (Figs. 1 and 2) which is arranged in pipes. Steam entering the pipe f will be su- 95 the form of a ring and connected by unions perheated and passing through Vthe pipe h with an induction g communicating with a will pass into the siphon t' and spray the oil source of steam supply and upon the opposite which has been admitted through the pipe ,7, side with an eduction pipe h leading updown into the pipe e, the combustion taking 5o wardly from the top of said furnace. A'steam place at the mouth of the pipe e. A portion roe of the superheated steam is also carried down through the pipe k to the pipe L from whence it is injected through the various jets L into the furnace, carrying therewith jets of air, which jets of air and steam converge at a central point over the well where they are met by the downwardlyprojeeted fiame of burning oil and decomposed steam from the pipe e. The heat therefore immediately over the well has reached its maximum intensity and readily reduces the ore entering from the chute n. As the ore passes down the chute, it is met by the highly heated products of combustion and is dried and roasted and readily gives off its fumes which vescape through the chimney p. The molten ore as fast as reduced is drawn off through the pipe q while the slag is drawn off through the opening q in the side of the furnace.

The advantages of my furnace are: that where oil is used as a fuel the ore can be easily and quickly reduced without danger of putting out the flame since the ore is admitted below the llame; that by directing the flame upon the ore as it passes into the well it is melted with great rapidity and sinking immediately into the well beneath the slag is saved from volatilization and loss; that the furnace is easily and cheaply constructed and that because of its simplicity, it is portable.

While I have herein shown and described my furnace as particularly applicable as an ore smelter, yet it is obvious that it might be employed for smelting, roasting, or burning a large variety of substances. It is perhaps particularly applicable for use as a garbage burning furnace, and I would have it understood that I contemplate its use for the burning of any article desired.

1. A furnace consisting of a converter having a heating chamber, an oil admission pipe leading into the heating chamber and adapted to discharge a flame downward and a supply chute leading into said chamber below the flame port, substantially as described.

2. A smelting furnace consisting of a converter having a well d, a heating chamber above the well, steam and oil pipes leading into the heating chamber and adapted to discharge a flame downward and a chute leading into said chamber below the llame port and above the well substantially as described.

3. A smelting furnace consisting of a converter having a well and a heating chamber above the well, a steam pipe leading into said chamber and havingits discharge adjacent to the top thereof, an oil supply joining the steam supply before the discharge, a depending pipe extending from the oil and steam dischargefinto the heating chamber, and an ore supply chute joining the heating cham,

ber between the end of the depending pipe and the well substantially as described.

4. A smelting furnace consisting of a converter having a Well and a heating chamber above the well, steam andoil pipes leading into the heating chamber and adapted to discharge a flame downward, means for introducing air at the side of the furnace and above the well and a chute leading into said chamber below the flame port and above the well substantially as described.

5. A smelting furnace consisting of a converter having a well and a heating chamber above the well, a steam pipe arranged to pass through the chamber, a discharge jet communicating with said steam pipe, a source of oil supply operatively connected with said discharge jet, an enlarged depending pipe leading into said furnace and in operative proximity to said discharge jetY and a'chute leading into said converter, said chute having a chimney opening at the top, substantially as described.

` 6. A smelting furnace consisting of a hollow chambered receptacle lined withv refractory material, an inclined chute communicating with the side thereof, a depending pipe open at both ends, leading into said chamber fromthe top and means for introducing a jet of oil and superheated steam into said pipe whereby the flame may be directed upon the top of the material to be burned substantially as described.

7. In a smelting furnace the combination of an oil burner arranged immediately above the well of the furnace, means for commingling superheaded steam and air with the oil at the point of combustion, and a combined feeding chute and chimney leading directly to the well substantially as described.

In testimony-whereof I sign this specification in the presence of two witnesses. y

OSCAR LUDWIG. Witnesses: v

FREDK. H. MILLS, WALTER H. CHAMBERLiN.

IOO 

